Lisa Marie Presley, singer-songwriter and daughter of Elvis and Priscilla Presley, has died. She was 54. "It is with a heavy heart that I must share the devastating news that my beautiful daughter Lisa Marie has left us," Priscilla confirmed in a statement to PEOPLE Thursday evening. "She was the most passionate strong and loving woman I have ever known. We ask for privacy as we try to deal with this profound loss. Thank you for the love and prayers. At this time there will be no further comment."